Skimmer test plug



FIG. 1 is a plan view of a skimmer test plug showing our new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a left side elevational view thereof, the opposite side being substantially the same;

FIG. 4 is a top elevational view thereof, the bottom view being substantially the same; and,

FIG. 5 is a cross-sectional view of FIG. 1 taken along the plane 5--5 illustrating the internal configuration thereof. 

The ornamental design for a skimmer test plug, as shown and described. 